Small Twin Turbos vs Supercharger - School me Please

[KLC]

Understood. It's just a preference, run what you like it makes no difference to me. FWIW my LS2 engine is N/A with a carbureted intake manifold, a Holley throttle body EFI and great big old school air cleaner, everyone said don't do it like that it'll never work right. In reality it works rather well and gets a lot of attention and even more people telling me they love it. I'd upgrade the engine with a Whipple while the car is down with a new chassis build, but I used cast pistons to save some money and I still run 930 CVs so boost is a no-go for me. I don't really need any more power anyways, most of the time the 450ish HP my engine makes is plenty.

 

[Rockwood]

Understood. It's just a preference, run what you like it makes no difference to me. FWIW my LS2 engine is N/A with a carbureted intake manifold, a Holley throttle body EFI and great big old school air cleaner, everyone said don't do it like that it'll never work right. In reality it works rather well and gets a lot of attention and even more people telling me they love it. I'd upgrade the engine with a Whipple while the car is down with a new chassis build, but I used cast pistons to save some money and I still run 930 CVs so boost is a no-go for me. I don't really need any more power anyways, most of the time the 450ish HP my engine makes is plenty.

I honestly prefer supercharger as well, but mainly because there’s zero waiting on power.

But… Turbo is king of going fast.

 

[J Alper]

One of the guys we used to dune with has twins on a 406 in his Tatum, it ran good when all was good but there were more days when it wasn't right and it ruined more than one dune trip for the group. It was professionally built and tuned. Had the engine out with the heads off a few times, retuned a few times, now he's building a new engine with aftermarket block although I don't know all of the details.

I just don't like turbos, a feel a supercharger is better all around for driveability. The torque down low is a better tradeoff vs making power at 6500.

2 of the Whipples we installed this year, both pulled the Turbos off they spent all last season, trying everything, went to small sizes, bump up compression, and the owners said for they way they like to drive, the supercharger was complete different feeling then the turbos,

 

[Rockwood]

2 of the Whipples we installed this year, both pulled the Turbos off they spent all last season, trying everything, went to small sizes, bump up compression, and the owners said for they way they like to drive, the supercharger was complete different feeling then the turbos,

I think with the displacement of a V8, there really isn't a need to go turbo to make duneable power goals.

Unless you like the way turbo drives. The power delivery is certainly entertaining.

 

[DarkSide]

Speaking with Jody one of the owners of VP fuel station in Las Vegas,
that is for non performance octane boost,

for what we do he said use this one,

https://vpracingfuels.com/products/vp-octanium%C2%AE-octane-booster

I'm running an O2 sensor. This one says not for use with O2 or catalytic systems.

 

[funco4lizzle]

I have no skin in this fight, but I used to run a Subie at 25lbs of boost, full boost was a rocket ship, but also a little undrivable.

This sounds stupid but I think my gen 4 subie @ 25psi was more fun to drive than my GTF

 

[J Alper]

I'm running an O2 sensor. This one says not for use with O2 or catalytic systems.

The sand cars dont get used like a street car, big concern would be the catalytic converter, so far my holley O2 is 8 years old with no issues,

 

[Bobalos]

We replaced them every 3 years in the TT drag car I worked on, we ran leaded C16. We we replaced them not because they were acting up but to make aure we got good data. We don't think one of them died, just part of the maint.

 

[Rockwood]

We replaced them every 3 years in the TT drag car I worked on, we ran leaded C16. We we replaced them not because they were acting up but to make aure we got good data. We don't think one of them died, just part of the maint.

Same, except mine was a Time Attack car, so saw a lot more miles. It was an annual replacement type thing.

Biggest thing is making sure they're not on the lower half of the exhaust pipe where moisture can collect in them.

 

[DarkSide]

Got some decent numbers from my TT 6.0 setup yesterday. This is on 11lbs of boost and I threw 5 gallons of 110 in the tank to be safe.

 

[daveH]

Turbos have come a long way in the last ten years. there is a reason most OEM's have turbo charged engines nowadays instead of mechanical superchargers.

for those saying turbos are "undriveable" in the dunes or up top in the power band.....i have three words for you.........proper boost control.

its not just the turbos that have come a long ways, but also quality motorsport electronics that no longer are priced at stratospheric levels. Good electronics allow for boost levels to be tuned per gear, or vehicle speed or manual section of boost output.....and other factors. I have seen very few that take the time to set this up correctly and tune it based on their driving preferences.